Datasheet

TPA6138A2
www.ti.com SLOS704A –JANUARY 2011– REVISED MAY 2011
ELECTRICAL CHARACTERISTICS
V
DD
= 3.3 V, R
DL
= 32 Ω, R
fb
= 30 kΩ, R
IN
= 15 kΩ, T
A
= 25°C, Charge pump: C
P
= 1 µF (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
|V
OS
| Output offset voltage V
DD
= 3.3 V 0.5 1 mV
PSRR Power-supply rejection ratio 80 dB
V
OH
High-level output voltage V
DD
= 3.3 V 3.1 V
V
OL
Low-level output voltage V
DD
= 3.3 V –3.05 V
V
UVP_EX
External UVP detect voltage 1.25 V
V
UVP_EX_HYSTERESIS
External UVP detect hysteresis current 5 µA
f
CP
Charge-pump switching frequency 200 300 400 kHz
|I
IH
| High-level input current, Mute V
DD
= 3.3 V, V
IH
= V
DD
1 µA
|I
IL
| Low-level input current, Mute V
DD
= 3.3 V, V
IL
= 0 V 1 µA
V
DD
= 3.3 V, no load, Mute = V
DD
, no load 5 14 25
I
DD
Supply current mA
V
DD
= 3.3 V, no load, Mute = GND, 14
disabled
OPERATING CHARACTERISTICS
V
DD
= 3.3 V, R
DL
= 32 Ω, R
fb
= 30 kΩ, R
IN
= 15 kΩ, T
A
= 25°C, Charge pump: C
P
= 1 µF (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
P
O
Output power, outputs in phase THD+N = 1%, V
DD
= 3.3 V, f = 1 kHz, R
L
= 32 Ω 40 mW
THD+N Total harmonic distortion plus noise V
DD
= 3.3V, f = 1kHz, R
LD
= 32Ω, Po = 10mW 0.01%
SNR Signal-to-noise ratio
(1)
A-weighted 90 96 dB
DNR Dynamic range
(2)
A-weighted 90 100 dB
V
N
Noise voltage A-weighted 13 μV
Z
O
Output Impedance when muted Mute = GND 110 mΩ
Input-to-output attenuation when Mute = GND 80 dB
muted
Crosstalk—L to R, R to L Po = 20 mW –75 dB
I
LIMIT
Current limit PVDD = 3.3 V 50 mA
(1) SNR is calculated relative to 25-mW output.
(2) DNR is calculated relative to output at 1% THD+N.
Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): TPA6138A2